INGREDIENTS
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1 refrigerated pie crust or homemade tart shell (click here for a recipe)
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1 large head cauliflower, cut into florets
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1 large yellow onion, cut in half and thinly sliced
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1 8 -ounce package mascarpone cheese (substitute sour cream for a lighter version)
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1 cup grated Gruyère (or substitute Swiss OR fontina/Parmesan combo)
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2 tablespoons grated Parmesan
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1/2 cup heavy cream
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2 large eggs
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Truffle oil (optional)
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Olive oil
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Dijon mustard
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Pinch of ground nutmeg
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Salt
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Pepper
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Sugar
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